A display panel and a display device

Abstract

The present application discloses a display panel and a display device, including a substrate, a light-emitting layer, a multi-layered insulating film layer and a first adjustment film layer. The light-emitting layer is located on the substrate, and the light-emitting layer includes red sub-pixels, green sub-pixels and blue sub-pixels arranged in the same layer; the multi-layered insulating film layer is located on the side of the light-emitting layer away from the substrate, wherein the multi-layered insulating film layer includes a first adjustment film layer, and the orthographic projection of the first adjustment film layer on the light-emitting layer covers the red sub-pixel; wherein the light emitted by the red sub-pixel, the green sub-pixel and the blue sub-pixel is reflected on the surface of the insulating film layer, and the reflectivity of the light emitted by the red sub-pixel on the surface of the first adjustment film layer is the largest. By designing the adjustment film layer, the small viewing angle brightness attenuation of red light is accelerated, and the phenomenon that the white field track is prone to appear reddish at small viewing angles is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] At present, when the monochrome microcavity structure of the display panel is adjusted with the device structure, the monochrome brightness attenuation amplitude is different at different viewing angles (especially at small viewing angles). Since the brightness of red light attenuates slowly at small viewing angles, under conventional device structures, the white field track is prone to appear reddish at small viewing angles, affecting the display effect of the display panel.

[0003] Therefore, a new type of display panel is needed, whose structure can accelerate the brightness attenuation of red light at a small viewing angle, thereby improving the problem of color deviation at a small viewing angle. Summary of the invention

[0004] The present application mainly provides a display panel and a display device, which accelerates the small viewing angle brightness attenuation of red light by adding a first adjustment film layer to the display panel, thereby improving the problem of color deviation at small viewing angles and improving the overall display effect.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a display panel, including: a substrate, a light-emitting layer, a multi-layered insulating film layer and a first adjustment film layer. The light-emitting layer is located on the substrate, and the light-emitting layer includes red sub-pixels, green sub-pixels and blue sub-pixels arranged in the same layer; the multi-layered insulating film layer is located on the side of the light-emitting layer away from the substrate, wherein the multi-layered insulating film layer includes a first adjustment film layer, and the orthographic projection of the first adjustment film layer on the light-emitting layer covers the red sub-pixel; wherein the light emitted by the red sub-pixel, the green sub-pixel and the blue sub-pixel is reflected on the surface of the insulating film layer, and the reflectivity of the light emitted by the red sub-pixel on the surface of the first adjustment film layer is the largest.

[0006] Optionally, at least one of the insulating film layers is provided with a first groove, the orthographic projection of the first groove on the light-emitting layer covers the red sub-pixel, and the first adjustment film layer fills the first groove; the refractive index of the first adjustment film layer satisfies: the square root of the product of the refractive indices of two adjacent insulating film layers in the stacking direction;

[0007] Preferably, in the stacking direction, the thickness of the insulating film layer provided with the first groove is greater than the depth of the first groove.

[0008] Optionally, the display panel includes an encapsulation layer, and the encapsulation layer includes a plurality of stacked insulating film layers;

[0009] Preferably, the insulating film layer in the encapsulation layer includes a first inorganic layer, a first organic layer, and a second inorganic layer; and the first inorganic layer is closer to the light-emitting layer than the first organic layer.

[0010] Optionally, the first adjustment film layer is disposed in the first inorganic layer;

[0011] Preferably, a first groove is provided on a side of the first inorganic layer facing away from the light-emitting layer; or, the first adjustment film layer is disposed in the first organic layer; preferably, a first groove is provided on a side of the first organic layer facing the first inorganic layer.

[0012] Optionally, the first adjustment film layer is disposed in the first inorganic layer and the first adjustment film layer is respectively disposed in the first organic layer;

[0013] The first adjustment film layer located in the first inorganic layer and the first adjustment film layer located in the first organic layer are spaced apart in the stacking direction;

[0014] Preferably, a first groove is provided on a side of the first inorganic layer close to the first organic layer; a first groove is provided on a side of the first organic layer facing away from the first inorganic layer.

[0015] Optionally, the first inorganic layer includes a plurality of first inorganic sub-layers stacked, and the first adjustment film layer is disposed in the first inorganic sub-layer adjacent to the first organic layer.

[0016] Optionally, the display panel further includes a touch control layer, the touch control layer is disposed on a side of the encapsulation layer facing away from the light-emitting layer, the touch control layer includes the insulating film layer, and the insulating layer in the touch control layer includes a third inorganic layer adjacent to the encapsulation layer; wherein, the first adjustment film layer is disposed in the third inorganic layer;

[0017] And / or, the first adjustment film layer is disposed in the encapsulation layer.

[0018] Optionally, the first adjustment film layer includes at least two first adjustment sub-film layers stacked;

[0019] In the direction from the substrate to the light-emitting layer, the refractive index of the first adjustment sub-film layer decreases layer by layer, or the refractive index of the first adjustment sub-film layer increases layer by layer.

[0020] Optionally, the multi-layer insulating film layer further includes a second adjustment film layer and a third adjustment film layer. The positive projection of the second adjustment film layer on the light-emitting layer covers the green sub-pixel, and the positive projection of the third adjustment film layer on the light-emitting layer covers the blue sub-pixel. Wherein, the refractive index of the first adjustment film layer is less than that of the second adjustment film layer, and the refractive index of the second adjustment film layer is less than that of the third adjustment film layer.

[0021] Another technical solution adopted in this application is: to provide a display device, including any one of the display panels provided in this application.

[0022] The beneficial effects of this application are: different from the prior art, the multi-layer insulating film layer of the display panel provided in this application includes a first adjustment film layer, and the positive projection of the first adjustment film layer on the light-emitting layer covers the red sub-pixel; wherein the light emitted by the red sub-pixel in the light-emitting layer irradiates out of the display panel after passing through the first adjustment film layer. At the same time, the first adjustment film layer is arranged in the insulating film layer, and the first adjustment film layer will contact the layer structure of the insulating film layer in the display panel. The interface where the first adjustment film layer contacts different insulating film layers will have a certain reflection on the light emitted by the red sub-pixel, weakening the reflection effect in the insulating film layer. Furthermore, it accelerates the small-angle brightness attenuation of the red light, thereby improving the problem of small-angle color shift, so that the reflectivity of the light emitted by the red sub-pixel when passing through the surface of the first adjustment film layer is the largest. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the display panel in this application;

[0025] Figure 2 For Figure 1 The optical waveform diagram obtained from the structure in;

[0026] Figure 3 It is a schematic structural diagram of another embodiment of the display panel in this application;

[0027] Figure 4 For Figure 3 The optical waveform diagram obtained from the structure in;

[0028] Figure 5 It is a cross-sectional view of another embodiment of the display panel in this application;

[0029] Figure 6 is a schematic diagram of an optical waveform obtained according to the structure in Figure 5 ;

[0030] Figure 7 is a cross-sectional view of another embodiment of the display panel in the present application;

[0031] Figure 8 is a schematic diagram of an optical waveform obtained according to the structure in Figure 7 ;

[0032] Figure 9 is a cross-sectional view of yet another embodiment of the display panel in the present application;

[0033] Figure 10 is a schematic diagram of an optical waveform obtained according to the structure in Figure 9 ;

[0034] Figure 11 is a cross-sectional view of yet another embodiment of the display panel in the present application;

[0035] Figure 12 is a schematic diagram of an optical waveform obtained according to the structure in Figure 11 ; Specific Embodiments

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0037] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an embodiment of the display panel in the present application. The present application provides a display panel 10, including: a substrate 1, a light-emitting layer 2, and a multi-layered insulating film layer and a first adjustment film layer 41 stacked. The substrate 1 may include a base and a driving circuit. The base may be rigid or flexible, and it may be a metal substrate, a quartz substrate, a glass substrate, or a resin substrate, etc. For example, the base may be composed of polyimide PI. The substrate 1 is an essential step in the preparation process of the display panel 10. The production of the substrate 1 facilitates the completion of the subsequent processes of the display panel 10 and effectively improves the reliability of the display panel 10. The light-emitting layer 2 is located on the substrate 1, and the light-emitting layer 2 includes a red sub-pixel 21, a green sub-pixel 22, and a blue sub-pixel 23 arranged in the same layer; red, green, and blue are the three primary colors of light. These three primary colors of light are mixed in different proportions to obtain almost all the colors of light in nature, enabling the display panel 10 to have a variety of color displays.

[0038] Among them, the multi-layered insulating film layers are arranged in a stacked manner on the side of the light-emitting layer 2 away from the substrate 1. Among them, the multi-layer insulating film layers include a first adjustment film layer 41, and the orthographic projection of the first adjustment film layer 41 on the light-emitting layer 2 covers the red sub-pixel 21. Among them, the light emitted by the red sub-pixel 21, the green sub-pixel 22, and the blue sub-pixel 23 is reflected on the surface of each film layer at the corresponding position, and the reflectivity of the light emitted by the red sub-pixel 21 after passing through the surface of the first adjustment film layer 41 is the largest. Among them, the light emitted by the red sub-pixel 21 in the light-emitting layer 2 will pass through the first adjustment film layer 41 and then exit the display panel 10. At the same time, the first adjustment film layer 41 is arranged in other insulating film layers, and the first adjustment film layer 41 will contact the layer structure of other insulating film layers in the display panel 10. At the same time, the refractive index of the first adjustment film layer 41 and the refractive index of the other insulating film layers in contact satisfy certain conditions. The interface where the first adjustment film layer 41 contacts the other insulating film layers will have a certain reflection on the light emitted by the red sub-pixel, weakening the reflection effect in the insulating film layer. Furthermore, it accelerates the small-angle brightness attenuation of the red light, thereby improving the problem of small-angle color shift, making the reflectivity of the light emitted by the red sub-pixel after passing through the surface of the first adjustment film layer 41 the largest.

[0039] Furthermore, at least one insulating film layer is provided with a first groove 410. The orthographic projection of the first groove 410 on the light-emitting layer 2 covers the red sub-pixel 21, and the first adjustment film layer 41 fills the first groove 410. That is, the first adjustment film layer 41 and the insulating film layer provided with the first groove 410 are arranged in the same layer. Further, the upper surface of the first adjustment film layer 41 is flush with the upper surface of the insulating film layer provided with the first groove 410, or the lower surface of the first adjustment film layer 41 is flush with the lower surface of the insulating film layer provided with the first groove 410. At the same time, according to functional requirements, multiple first grooves 410 can be provided in the multi-layer insulating film layers. The refractive index of the first adjustment film layer 41 satisfies: the square root of the product of the refractive indices of the two adjacent insulating film layers in the stacking direction. That is, for the best display effect, in the stacking direction, the refractive index of the first adjustment film layer 41 satisfies the square root of the product of the refractive index of the insulating film layer in contact with its upper surface and the refractive index of the insulating film layer in contact with its lower surface. Preferably, in the stacking direction, the thickness of the insulating film layer provided with the first groove 410 is greater than the depth of the first groove 410. That is, the thickness of the first adjustment film layer 41 is less than the thickness of the insulating film layer provided with the first groove 410.

[0040] Please continue to refer to Figure 1, the display panel 10 includes a packaging layer 3, and the packaging layer 3 includes multiple insulating film layers; the main function of the packaging layer 3 is to seal and isolate moisture to protect the light-emitting layer 2. Preferably, the multiple insulating film layers include a first inorganic layer 31, a first organic layer 32, and a second inorganic layer 33 that are stacked; and the first inorganic layer 31 is closer to the light-emitting layer 2 than the first organic layer 32. Only this structure is shown in this application. According to requirements, the packaging layer 3 can have insulating film layers with different numbers of layers and different materials.

[0041] Please continue to refer to Figure 1 , the multiple insulating film layers further include a first adjustment film layer 41, and the first adjustment film layer 41 is disposed within the first inorganic layer. Preferably, a first groove 410 is provided on a side of the first inorganic layer 31 facing away from the light-emitting layer 2, and the first adjustment film layer 41 fills the first groove 410, that is, the upper surface of the first adjustment film layer 41 is flush with the upper surface of the first inorganic layer 31 where the first groove 410 is provided.

[0042] At this time, the refractive index of the first adjustment film layer 41 is determined according to the refractive indices of the upper and lower insulating film layers of the structure in which it is located. As Figure 1 shown, the upper surface of the first adjustment film layer 41 is in contact with the first organic layer 32, and the lower surface of the first adjustment film layer 41 is in contact with the first inorganic layer 31. The refractive index of the first adjustment film layer 41 is calculated according to the formula where N 41 is the refractive index of the first adjustment film layer 41, N 31 is the refractive index of the first inorganic layer 31, and N 32 is the refractive index of the first organic layer 32. In a preferred embodiment, the refractive index of the first adjustment film layer 41 is 1.61 - 1.65. For example, as can be seen in Table 1, when the refractive index of the first inorganic layer 31 is 1.78 and the refractive index of the first organic layer 32 is 1.5, the refractive index of the first adjustment film layer 41 calculated from the above formula is 1.63. In actual application, when the refractive index of the first adjustment film layer 41 is 1.63 ± 0.2, that is, within the range of 1.61 - 1.65, it can meet the application requirements and play a role in improving the display effect.

[0043] Table 1:

[0044] Layer structure First inorganic layer 31 First adjustment film layer 41 First organic layer 32 Refractive index 1.78 1.63 1.5

[0045] The thickness d 41 of the first adjustment film layer 41 satisfies the following formula: d 41 =(2k - 1)λ / 4N 41 . Where N 41 is the refractive index of the first adjustment film layer 41, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600 nm - 660 nm; the thickness d of the first adjustment film layer 41 can be calculated according to the formula41 is 70 nm to 110 nm. At the same time, according to the formula, it can be known that the thickness of the first adjustment film layer 41 has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, that is, the red sub-pixel. The first adjustment film layer 41 is an inorganic material layer, and the material includes one or more of silicon oxynitride, silicon oxide, and silicon nitride. When the first adjustment film layer 41 and the first inorganic layer 31 contain the same components, the same manufacturing process can be used for manufacturing, such as chemical vapor deposition.

[0046] Furthermore, a first adjustment film layer 41 is provided between the first inorganic layer 31 and the first organic layer 32, and the refractive index of the first adjustment film layer 41 is located between the refractive index of the first inorganic layer 31 and the refractive index of the first organic layer 32. The contact interface between the first inorganic layer 31 and the first adjustment film layer 41 and the contact interface between the first adjustment film layer 41 and the first organic layer 32 will both reflect the light emitted by the light-emitting layer 220. The reflected light of the contact interface between the first adjustment film layer 41 and the first organic layer 32 will interfere with the reflected light of the contact interface between the first inorganic layer 31 and the first adjustment film layer 41, weakening the reflection effect of the contact interface between the first inorganic layer 31 and the first auxiliary film layer 32.

[0047] Please refer to Figure 2 , Figure 2 is a schematic diagram of the light waveform obtained according to the Figure 1 structure; assume that the light reflected by the contact interface between the first inorganic layer 31 and the first adjustment film layer 41 from the light-emitting layer 2 is the first light ray, and the first light ray has a first waveform λ1; the light reflected by the contact interface between the first adjustment film layer 41 and the first organic layer 32 from the light-emitting layer 2 forms a second light ray, and the second light ray has a second waveform λ2. In these alternative embodiments, when the thickness d 41 of the first adjustment film layer 41 satisfies the above relationship, within the first inorganic layer 31, the first waveform λ1 and the second waveform λ2 are in a destructive position, the peak of the first waveform λ1 overlaps with the trough of the second waveform λ2, so that the second light ray can cancel the first light ray, thereby weakening or even eliminating the reflection effect of the contact interface between the first inorganic layer 31 and the first adjustment film layer 41 within the first inorganic layer 31, eliminating the viewing angle color shift or color rendering unevenness caused by the non-uniform thickness of the first inorganic layer 31, and further accelerating the small viewing angle brightness attenuation of the red light, and further improving the display effect of the display panel 10.

[0048] Please refer to Figure 3 , Figure 3Schematic structural diagram of another embodiment of the display panel in the present application; a first adjustment film layer 41 is provided in the first organic layer 32; preferably, a first groove 410 is provided on the side of the first organic layer 32 facing the first inorganic layer 31. The first adjustment film layer 41 fills the first groove 410; that is, the lower surface of the first adjustment film layer 41 is flush with the lower surface of the first organic layer 32 where the first groove 410 is provided.

[0049] The upper surface of the first adjustment film layer 41 is in contact with the first organic layer sub-layer 321, and the lower surface of the first adjustment film layer 41 is in contact with the first inorganic layer 31. The refractive index of the first adjustment film layer 41 is calculated according to the formula where N 41 is the refractive index of the first adjustment film layer 41, N 31 is the refractive index of the first inorganic layer 31, and N 321 is the refractive index of the first organic layer sub-layer 321. In a preferred embodiment, under the condition that the refractive index of the first inorganic layer 31 is 1.78:

[0050] 1. In a preferred embodiment: the refractive index of the first adjustment film layer 41 is 1.61 - 1.65. When the refractive index of the first organic layer sub-layer 321 is the same as that of the first organic layer 32, for example, as can be seen in Table 2, when the refractive index of the first organic layer 32 is 1.5, at this time, according to the formula calculation, the refractive index of the first adjustment film layer 41 is 1.63.

[0051] 2. In a preferred embodiment: the refractive index of the first adjustment film layer 41 is 1.6 - 1.7. When the refractive index of the first organic layer sub-layer 321 is different from that of the first organic layer 32, for example, when the refractive index of the first organic layer sub-layer 321 is 1.5 - 1.6; at this time, according to the formula calculation, the refractive index of the first adjustment film layer 41 is 1.63 - 1.69. In the actual application process, when the refractive index of the first adjustment film layer 41 is 1.62 or 1.7, that is, within the range of 1.6 - 1.7, it can meet the application requirements and play a role in improving the display effect.

[0052] Table 2:

[0053] Layer structure First inorganic layer 31 First adjustment film layer 41 First organic layer sublayer 321 1 1.78 1.63 1.5 2 1.78 1.63-1.69 1.5-1.6

[0054] The thickness d of the first adjustment film layer 41 41 satisfies the following relationship: d 41 =(2k - 1)λ / 4N 41 . Wherein, N 41 is the refractive index of the first adjustment film layer 41, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600nm - 660nm; according to the formula calculation, the thickness d of the first adjustment film layer 41 41is from 70 nm to 110 nm, and at the same time, the thickness of the first adjustment film layer 41 has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, that is, the red sub-pixel; the first adjustment film layer 41 is an organic material layer. When the first adjustment film layer 41 and the first organic layer 32 contain the same components, the same manufacturing process can be used for manufacturing, such as inkjet printing.

[0055] A first adjustment film layer 41 is provided between the first inorganic layer 31 and the first organic layer sub-layer 321, and the refractive index of the first adjustment film layer 41 is between the refractive index of the first inorganic layer 31 and the refractive index of the first organic layer sub-layer 321. The contact interface between the first inorganic layer 31 and the first adjustment film layer 41 and the contact interface between the first adjustment film layer 41 and the first organic layer sub-layer 321 will both reflect the light emitted by the light-emitting layer 2. The reflected light from the contact interface between the first adjustment film layer 41 and the first organic layer sub-layer 321 will interfere with the reflected light from the contact interface between the first inorganic layer 31 and the first adjustment film layer 41, weakening the reflection effect of the contact interface between the first inorganic layer 31 and the first auxiliary film layer 32.

[0056] Please refer to Figure 4 , Figure 4 is the schematic diagram of the light waveform obtained according to the Figure 3 structure therein; assume that the light emitted by the light-emitting layer 2 reflected by the contact interface between the first inorganic layer 31 and the first adjustment film layer 41 is the third light ray, and the third light ray has a third waveform λ3; the light emitted by the light-emitting layer 2 reflected by the contact interface between the first adjustment film layer 41 and the first organic layer sub-layer 321 forms a fourth light ray, and the fourth light ray has a fourth waveform λ4.

[0057] In these alternative embodiments, when the thickness d 41 of the first adjustment film layer 41 satisfies the above relationship, within the first inorganic layer 31, the third waveform λ3 and the fourth waveform λ4 are in the cancellation position, the peak of the third waveform λ3 overlaps with the valley of the fourth waveform λ4, so that the fourth light ray can cancel the third light ray, thereby weakening and even eliminating the reflection effect of the contact interface between the first inorganic layer 31 and the first adjustment film layer 41, reducing and even eliminating the viewing angle color shift or color rendering unevenness at a small viewing angle of red light, and further improving the display effect of the display panel 10.

[0058] Please refer to Figure 5 , Figure 5A cross-sectional view of another embodiment of the display panel in the present application; a first adjustment film layer 41a is disposed in the first inorganic layer 31 and a first adjustment film layer 41b is disposed in the first organic layer 32; preferably, the first adjustment film layer 41a located in the first inorganic layer 31 and the first adjustment film layer 41b located in the first organic layer 32 are spaced apart in the stacking direction; preferably, a first groove 410a is provided on one side of the first inorganic layer 31 close to the first organic layer 32; a first groove 410b is provided on one side of the first organic layer 32 facing away from the first inorganic layer 31. Among them, the first adjustment film layer 41a fills the first groove 410a and the first adjustment film layer 41b fills the first groove 410b.

[0059] Among them, the upper surface of the first adjustment film layer 41a is flush with the upper surface of the first inorganic layer 31 provided with the first groove 410a, the upper surface of the first adjustment film layer 41a is in contact with the first organic layer 32, and the lower surface of the first adjustment film layer 41a is in contact with the first inorganic layer 31.

[0060] The refractive index of the first adjustment film layer 41a is calculated according to the formula where N41a is the refractive index of the first adjustment film layer 41a, N 31 is the refractive index of the first inorganic layer 31, and N 32 is the refractive index of the first organic layer 32. In the calculation of the refractive index of the first adjustment film layer 41a, in a preferred embodiment, the refractive index of the first adjustment film layer 41a is 1.6 - 1.7. For example, see Table 3: When the refractive index of the first inorganic layer 31 is 1.78 and the refractive index of the first organic layer 32 is 1.5 - 1.6, at this time, according to the formula calculation, the refractive index of the first adjustment film layer 41a is 1.63 - 1.69.

[0061] Table 3:

[0062] Layer structure First inorganic layer 31 First adjustment film layer 41a First organic layer 32 Refractive index 1.78 1.63-1.69 1.5-1.6

[0063] The upper surface of the first adjustment film layer 41b is flush with the upper surface of the first organic layer 32 provided with the first groove 410b. The upper surface of the first adjustment film layer 41b is in contact with the second inorganic layer 33, and the lower surface of the first adjustment film layer 41b is in contact with the first organic layer 32.

[0064] Among them, the refractive index of the first adjustment film layer 41b is calculated according to the formula where N41b is the refractive index of the first adjustment film layer 41b, N 32 is the refractive index of the first organic layer 32, and N 33is the refractive index of the second inorganic layer 33. In a preferred embodiment, the refractive index of the first adjustment film layer 41b is 1.6 - 1.74. For example, as shown in Table 4, when the refractive index of the first organic layer 32 is 1.5 - 1.6 and the refractive index of the second inorganic layer 33 is 1.8 - 1.9, the refractive index of the first adjustment film layer 41b calculated according to the formula is 1.64 - 1.74. In actual applications, when the refractive index of the first adjustment film layer 41b is 1.61 or 1.63, that is, within the range of 1.6 - 1.74, it can meet the application requirements and play a role in improving the display effect.

[0065] Table 4:

[0066] Layer structure First organic layer 32 First adjustment film layer 41b Second inorganic layer 33 Refractive index 1.5-1.6 1.64-1.74 1.8-1.9

[0067] The thickness d of the first adjustment film layer 41a 41a satisfies the following relationship: d41a = (2k - 1)λ / 4N41a; the thickness d41b of the first adjustment film layer 41b satisfies the following relationship: d41b = (2k - 1)λ / 4N41b.

[0068] where N41a is the refractive index of the first adjustment film layer 41a, N41b is the refractive index of the first adjustment film layer 41b, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600nm - 660nm; according to the formula calculation, the thickness d41a of the first adjustment film layer 41a is 70nm - 110nm, and the thickness d41b of the first adjustment film layer 41b is 70nm - 110nm; at the same time, the thickness of the first adjustment film layer 41 has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, that is, the red sub-pixel.

[0069] The first adjustment film layer 41a is an inorganic material layer, and the material includes one or more of silicon oxynitride, silicon oxide, and silicon nitride. When the first adjustment film layer 41a and the first inorganic layer 31 contain the same components, the same manufacturing process can be used for manufacturing, such as chemical vapor deposition. The first adjustment film layer 41b is an organic material layer. When the first adjustment film layer 41b and the first organic layer 32 contain the same components, the same manufacturing process can be used for manufacturing, such as inkjet printing.

[0070] A first adjustment film layer 41b is disposed between the second inorganic layer 33 and the first organic layer 32, and the refractive index of the first adjustment film layer 41b is between the refractive index of the second inorganic layer 33 and the refractive index of the first organic layer 32. The contact interface between the second inorganic layer 33 and the first adjustment film layer 41b and the contact interface between the first adjustment film layer 41b and the first organic layer 32 both reflect the light emitted by the light-emitting layer 220. The reflected light from the contact interface between the first adjustment film layer 41b and the first organic layer 32 interferes with the reflected light from the contact interface between the second inorganic layer 33 and the first adjustment film layer 41b, weakening the reflection effect of the contact interface between the first organic layer 32 and the first adjustment film layer 41b.

[0071] Please refer to Figure 6 , Figure 6 is a schematic diagram of the optical waveform obtained according to the structure in Figure 5 ;

[0072] Assume that the light reflected by the contact interface between the first adjustment film layer 41b and the first organic layer 32 from the light-emitting layer 2 forms a fifth light ray, and the fifth light ray has a fifth waveform λ5; the light reflected by the contact interface between the second inorganic layer 33 and the first adjustment film layer 41b from the light-emitting layer 2 is a sixth light ray, and the sixth light ray has a sixth waveform λ6. In these alternative embodiments, when the thickness d of the first adjustment film layer 41b 41b satisfies the above relationship, the fifth waveform λ5 and the sixth waveform λ6 are in a cancellation position, the peak of the fifth waveform λ5 overlaps with the trough of the sixth waveform λ6, so that the sixth light ray can cancel the fifth light ray, thereby weakening and even eliminating the reflection effect of the contact interface between the first organic layer 32 and the first adjustment film layer 41b, eliminating the viewing angle color shift or color rendering unevenness at a small red light viewing angle, and further improving the display effect of the display panel 10.

[0073] Please refer to Figure 7 , Figure 7 is a cross-sectional view of another embodiment of the display panel in the present application; the first inorganic layer 31 includes a plurality of first inorganic sub-layers stacked, and a first adjustment film layer 41 is disposed in the first inorganic sub-layer closest to the first organic layer 32. Please refer to Figure 7 , Figure 7 shows that the first inorganic layer 31 has a first inorganic layer sub-layer 311, a second inorganic layer sub-layer 312, and a third inorganic layer sub-layer 313. A first adjustment film layer 41 is disposed in the third inorganic layer sub-layer 313 closest to the first organic layer 32. At the same time, in the direction from the substrate layer 1 to the encapsulation layer 3, the refractive indices of the first inorganic layer sub-layer 311, the second inorganic layer sub-layer 312, and the third inorganic layer sub-layer 313 decrease layer by layer.

[0074] At this time, the refractive index of the first adjustment film layer 41 is determined according to the refractive indices of the upper and lower insulating film layers of its structure. AsFigure 7 As shown, the upper surface of the first adjustment film layer 41 is in contact with the first organic layer 32, and the lower surface of the first adjustment film layer 41 is in contact with the first inorganic layer 31. The refractive index of the first adjustment film layer 41 is calculated according to the formula where N41 is the refractive index of the first adjustment film layer 41, N311 is the refractive index of a sub-layer 311 of the first inorganic layer, and N32 is the refractive index of the first organic layer 32. In a preferred embodiment, the refractive index of the first adjustment film layer 41 is 1.6 - 1.7. For example, see Table 5: the refractive index of a sub-layer 311 of the first inorganic layer is 1.78, and the refractive index of the first organic layer 32 is 1.5 - 1.6; at this time, according to the formula calculation, the refractive index of the first adjustment film layer 41 is 1.63 - 1.69.

[0075] Table 5:

[0076] Layer structure First inorganic layer sublayer 311 First adjustment film layer 41 First organic layer 32 Refractive index 1.78 1.63-1.69 1.5-1.6

[0077] The thickness d of the first adjustment film layer 41 41 satisfies the following relationship: d 41 =(2k - 1)λ / 4N 41 ; where N41 is the refractive index of the first adjustment film layer 41, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600nm - 660nm; according to the formula calculation, the thickness d of the first adjustment film layer 41 41 is 70nm - 110nm, and at the same time, the thickness of the first adjustment film layer 41 has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, that is, the red sub-pixel; the first adjustment film layer 41 is an inorganic material layer, and the material includes one or more of silicon oxynitride, silicon oxide, and silicon nitride. When the first adjustment film layer 41 and the first inorganic layer 31 contain the same components, the same manufacturing process can be used for manufacturing, such as chemical vapor deposition.

[0078] The main material of a sub-layer 311 of the first inorganic layer is silicon oxide, the main material of a sub-layer 312 of the first inorganic layer is silicon nitride, and the main material of a sub-layer 313 of the first inorganic layer is silicon oxynitride. Among them, a sub-layer 311 of the first inorganic layer and a sub-layer 312 of the first inorganic layer can ensure the encapsulation effect of the encapsulation layer 3 on the light-emitting layer 2 and prevent water vapor from invading the light-emitting layer 2.

[0079] A first adjustment film layer 41 is disposed between the first inorganic layer three sublayer 313 and the first organic layer 32, and the refractive index of the first adjustment film layer 41 is between the refractive index of the first inorganic layer three sublayer 313 and the refractive index of the first organic layer 32. The contact interface between the first inorganic layer three sublayer 313 and the first adjustment film layer 41 and the contact interface between the first adjustment film layer 41 and the first organic layer 32 will reflect the light emitted by the light-emitting layer 2, and the reflected light at the contact interface between the first adjustment film layer 41 and the first organic layer 32 will interfere with the reflected light at the contact interface between the first inorganic layer three sublayer 313 and the first adjustment film layer 41, thereby weakening the reflection effect of the contact interface between the first inorganic layer three sublayer 313 and the first adjustment film layer 41.

[0080] See also Figure 8 , Figure 8 Based on Figure 7 Schematic diagram of the light waveform obtained by the structure in the figure;

[0081] Assume that the light emitted by the light-emitting layer 2 reflected from the contact interface between the first adjustment film layer 41 and the first inorganic layer three sub-layer 313 is the seventh light, and the seventh light has the seventh waveform λ7; the light emitted by the light-emitting layer 2 reflected from the contact interface between the first adjustment film layer 41 and the first organic layer 32 forms the eighth light, and the eighth light has the eighth waveform λ8. In these optional embodiments, when the thickness d of the first adjustment film layer 41 is 41 When the above relationship is satisfied, the seventh waveform λ7 and the eighth waveform λ8 are at a canceling position, the crest of the seventh waveform λ7 and the trough of the eighth waveform λ8 overlap, so that the eighth light can eliminate the seventh light, thereby weakening or even eliminating the reflection effect of the contact interface between the first inorganic layer 31 and the first adjustment film layer 41, eliminating the color deviation or uneven color rendering under a small viewing angle of red light, and further improving the display effect of the display panel 10.

[0082] See also Figure 9 , Figure 9 It is a cross-sectional view of another embodiment of the display panel in the present application; the display panel 10 also includes a touch layer 5, the touch layer 5 includes a third inorganic layer 51, which is stacked on the side of the encapsulation layer 3 away from the light-emitting layer 2; the touch layer 5 also includes a first metal layer 52, a fourth inorganic layer 53, a second metal layer 54 and an OCA optical adhesive layer 55, which are stacked in sequence. The first adjustment film layer 41b is arranged in the third inorganic layer 51 close to the encapsulation layer 3. And / or, the first adjustment film layer 41a is arranged in the encapsulation layer 3.

[0083] That is, the upper surface of the first adjustment film layer 41a is flush with the upper surface of the first inorganic layer 31 where the first groove 410a is set. At this time, the refractive index of the first adjustment film layer 41a is determined according to the refractive index of the upper and lower insulating film layers of the structure in which it is located. Figure 9As shown, the upper surface of the first adjustment film layer 41a is in contact with the first organic layer 32, and the lower surface of the first adjustment film layer 41a is in contact with the first inorganic layer 31. The refractive index of the first adjustment film layer 41a is calculated according to the formula where N 41a is the refractive index of the first adjustment film layer 41a, N 31 is the refractive index of the first inorganic layer 31, and N 32 is the refractive index of the first organic layer 32. In a preferred embodiment, the refractive index of the first adjustment film layer 41 is 1.63 - 1.67. For example, as shown in Table 6, when the refractive index of the first inorganic layer 31 is 1.78 and the refractive index of the first organic layer 32 is 1.5, the refractive index of the first adjustment film layer 41a calculated by the above formula is 1.63.

[0084] Table 6:

[0085] Layer structure First inorganic layer 31 First adjustment film layer 41a First organic layer 32 Refractive index 1.78 1.63 1.5

[0086] The thickness d of the first adjustment film layer 41a 41a satisfies the following relationship: d 41a =(2k - 1)λ / 4N 41a ; where N 41a is the refractive index of the first adjustment film layer 41a, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600nm - 660nm; according to the formula, the thickness d of the first adjustment film layer 41a 41a is 70nm - 110nm, and at the same time, the thickness of the first adjustment film layer 41a has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, i.e., the red sub-pixel;

[0087] Furthermore, the upper surface of the first adjustment film layer 41b is flush with the upper surface of the third inorganic layer 51 where the first groove 410b is provided. At this time, the refractive index of the first adjustment film layer 41b is determined according to the refractive indices of the upper and lower insulating film layers of its structure. As Figure 9 shown, the upper surface of the first adjustment film layer 41b has a fourth inorganic layer 53, and the lower surface of the first adjustment film layer 41b is in contact with the third inorganic layer 51. The refractive index of the first adjustment film layer 41b is calculated according to the formula where N b41b is the refractive index of the first adjustment film layer 41b, N 51 is the refractive index of the third inorganic layer 51, and N 53is the refractive index of the fourth inorganic layer 53. In a preferred embodiment, the refractive index of the first adjustment film layer 41b is 1.87 - 1.88. For example, referring to Table 7, when the refractive index of the third inorganic layer 51 is 1.85 and the refractive index of the fourth inorganic layer 53 is 1.9, the refractive index of the first adjustment film layer 41b calculated by the above formula is 1.87. In actual application, when the refractive index of the first adjustment film layer 41b is 1.88, that is, within the range of 1.87 - 1.88, it can meet the application requirements and play a role in improving the display effect.

[0088] Table 7:

[0089] Layer structure Fourth inorganic layer 53 First adjustment film layer 41b Third inorganic layer 51 Refractive index 1.9 1.87 1.85

[0090] The thickness d of the first adjustment film layer 41b 41b satisfies the following relationship: d 41b =(2k - 1)λ / 4N 41b ; where N 41b is the refractive index of the first adjustment film layer 41b, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600nm - 660nm; according to the formula calculation, the thickness d of the first adjustment film layer 41b 41b is 70nm - 110nm, and at the same time, the thickness of the first adjustment film layer 41b has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, that is, the red sub-pixel.

[0091] In this embodiment, the first adjustment film layer 41a and the first adjustment film layer 41b are inorganic material layers, and the materials include one or more of silicon oxynitride, silicon oxide, and silicon nitride. When the material of the first adjustment film layer 41a is the same as that of the first inorganic layer 31 and the material of the first adjustment film layer 41b is the same as that of the third inorganic layer 51, the same manufacturing process can be used for manufacturing, such as chemical vapor deposition.

[0092] A first adjustment film layer 41b is provided between the third inorganic layer 51 and the fourth inorganic layer 53, and the refractive index of the first adjustment film layer 41b is between the refractive index of the third inorganic layer 51 and the refractive index of the fourth inorganic layer 53. The contact interfaces between the third inorganic layer 51 and the first adjustment film layer 41b and between the first adjustment film layer 41b and the fourth inorganic layer 53 will both reflect the light emitted by the light-emitting layer 220. The reflected light from the contact interface between the first adjustment film layer 41b and the fourth inorganic layer 53 will interfere with the reflected light from the contact interface between the third inorganic layer 51 and the first adjustment film layer 41b, weakening the reflection effect of the contact interface between the third inorganic layer 51 and the first adjustment film layer 41b.

[0093] Please refer to Figure 10 , Figure 10 is based on Figure 9Schematic diagram of the optical waveform obtained by the middle structure. Assume that the light reflected by the contact interface between the third inorganic layer 51 and the first adjustment film layer 41b from the light-emitting layer 2 is the ninth light ray, and the ninth light ray has a ninth waveform λ9; the light reflected by the contact interface between the first adjustment film layer 41b and the fourth inorganic layer 53 from the light-emitting layer 2 forms the tenth light ray, and the tenth light ray has a tenth waveform λ10. In these alternative embodiments, when the thickness d of the first adjustment film layer 41b 41b satisfies the above relationship, the ninth waveform λ9 and the tenth waveform λ10 are in a cancellation position, the peak of the ninth waveform λ9 overlaps with the trough of the tenth waveform λ10, so that the tenth light ray can cancel the ninth light ray, thereby weakening and even eliminating the reflection effect at the contact interface between the third inorganic layer 51 and the first adjustment film layer 41b, eliminating the red small viewing angle color shift or color rendering unevenness, and further improving the display effect of the display panel 100.

[0094] Furthermore, when the first adjustment film layer 41 includes at least two stacked first adjustment sub-film layers, in the direction from the substrate 1 to the encapsulation layer 3, the refractive index gradually decreases layer by layer between the first adjustment sub-film layers, or the refractive index gradually increases layer by layer between the first adjustment sub-film layers.

[0095] The refractive index of the first adjustment film layer 41 is determined by the refractive indices of the upper and lower insulating film layers at its position. Please continue to refer to Figure 5 , a first adjustment film layer 41a is provided on one side of the first inorganic layer 31 close to the first organic layer 32; a first adjustment film layer 41b is provided on one side of the first organic layer 32 facing away from the first inorganic layer 31.

[0096] The upper surface of the first adjustment film layer 41a is flush with the upper surface of the first inorganic layer 31 provided with the first groove 410a. The upper surface of the first adjustment film layer 41a is in contact with the first organic layer 32, and the lower surface of the first adjustment film layer 41a is in contact with the first inorganic layer 31. Among them, the refractive index of the first inorganic layer 31 is greater than that of the first adjustment film layer 41a, and the refractive index of the first adjustment film layer 41a is greater than that of the first organic layer 32. In the direction from the substrate 1 to the encapsulation layer 3, the refractive indices of the first inorganic layer 31, the first adjustment film layer 41a, and the first organic layer 32 gradually decrease layer by layer. In this structure, when the first adjustment film layer 41a has multiple sub-film layers, in the direction from the substrate 1 to the encapsulation layer 3, the refractive index gradually decreases layer by layer between the first adjustment sub-film layers.

[0097] The upper surface of the first adjustment film layer 41b is flush with the upper surface of the first organic layer 32 provided with the first groove 410b. The upper surface of the first adjustment film layer 41b contacts the second inorganic layer 33, and the lower surface of the first adjustment film layer 41b contacts the first organic layer 32. Among them, the refractive index of the first organic layer 32 is less than that of the first adjustment film layer 41b, and the refractive index of the first adjustment film layer 41b is less than that of the second inorganic layer 33. In the direction from the substrate 1 to the encapsulation layer 3, the refractive indices of the first organic layer 32, the first adjustment film layer 41b, and the second inorganic layer 33 increase layer by layer. In such a structure, when the first adjustment film layer 41a has multiple sub-film layers, in the direction from the substrate 1 to the encapsulation layer 3, the refractive indices between the first adjustment sub-film layers increase layer by layer.

[0098] The first adjustment film layer 41 can be an inorganic material layer, or the first adjustment film layer 41 can be an organic material layer, or some of the first adjustment sub-film layers in the first adjustment film layer 41 are organic material layers and the other part is an inorganic material layer;

[0099] Please refer to Figure 11 , Figure 11 which is a cross-sectional view of another embodiment of the display panel in this application; the multi-layer insulating film layer further includes a second adjustment film layer 42 and a third adjustment film layer 43. The second adjustment film layer 42 covers the green sub-pixel 22, and the third adjustment film layer 43 covers the blue sub-pixel 23. Among them, the refractive index of the first adjustment film layer 41 is less than that of the second adjustment film layer 42, and the refractive index of the second adjustment film layer 42 is less than that of the third adjustment film layer 43.

[0100] In order to further improve the overall display effect of the display panel and eliminate the color deviation problem. In this embodiment, the design of the adjustment film layer is strengthened to achieve a better effect, such as Figure 11 shown, a first adjustment film layer 41a and a first adjustment film layer 41b are provided above the red sub-pixel 21, a second adjustment film layer 42a and a second adjustment film layer 42b are provided above the green sub-pixel 22, and a third adjustment film layer 43a and a third adjustment film layer 43b are provided above the blue sub-pixel 23. In the direction from the substrate 1 to the encapsulation layer 3, the refractive index of the first adjustment film layer 41a is less than that of the first adjustment film layer 41b, the refractive index of the second adjustment film layer 42a is less than that of the second adjustment film layer 42b, and the refractive index of the third adjustment film layer 43a is less than that of the third adjustment film layer 43b. Among them, because the refractive index of red light is less than that of green light, and the refractive index of green light is less than that of blue light, the refractive index of the first adjustment film layer 41a is less than that of the second adjustment film layer 42a, and the refractive index of the second adjustment film layer 42a is less than that of the third adjustment film layer 43a; the refractive index of the first adjustment film layer 41b is less than that of the second adjustment film layer 42b, and the refractive index of the second adjustment film layer 42b is less than that of the third adjustment film layer 43b.

[0101] The upper surface of the first adjustment film layer 41a contacts the first adjustment film layer 41b, and the lower surface of the first adjustment film layer 41a contacts the first inorganic layer 31. The upper surface of the first adjustment film layer 41b contacts the first organic layer 32, and the lower surface of the first adjustment film layer 41b contacts the first adjustment film layer 41a. In the best embodiment, the refractive index of the first adjustment film layer 41a is calculated according to the formula where N 41a is the refractive index of the first adjustment film layer 41, N 31 is the refractive index of the first inorganic layer 31, and N 41b is the refractive index of the first adjustment film layer 41b. The refractive index of the first adjustment film layer 41b is calculated according to the formula where N 41b is the refractive index of the first adjustment film layer 41b, N 41a is the refractive index of the first adjustment film layer 41a, and N 32 is the refractive index of the first organic layer 32. Simplifying the above formula gives In the preferred embodiment, the refractive index of the first adjustment film layer 41a is 1.67 - 1.73, and the refractive index of the first adjustment film layer 41b is 1.57 - 1.63. For example, referring to Table 8, when the refractive index of the first inorganic layer 31 is 1.78 and the refractive index of the first organic layer 32 is 1.5, the refractive index of the first adjustment film layer 41b calculated by the above formula is 1.63, and then the refractive index of the first adjustment film layer 41a is calculated to be 1.7. In the actual application process, when the refractive index of the first adjustment film layer 41a is 1.67 - 1.73 and the refractive index of the first adjustment film layer 41b is 1.57 - 1.63, it can meet the application requirements and play a role in improving the display effect.

[0102] Table 8:

[0103]

[0104] The thickness d of the first adjustment film layer 41a 41a satisfies the following relationship: d 41a =(2k - 1)λ / 4N 41a； where N 41a is the refractive index of the first adjustment film layer 41a, λ is the wavelength of red light, and k is a positive integer; preferably, the value of λ is 600nm - 660nm; according to the formula, the thickness d of the first adjustment film layer 41a 41a is 70nm - 110nm, and at the same time, the thickness of the first adjustment film layer 41a has a linear relationship with the wavelength of the light emitted by its corresponding sub-pixel, that is, the red sub-pixel; the thickness d of the first adjustment film layer 41b 41b satisfies the following relationship: d 41b=(2k - 1)λ / 4N 41b ; where N 41b is the refractive index of the first adjustment film layer 41b.

[0105] The first adjustment film layer 41a and the first adjustment film layer 41b are inorganic material layers, and the materials include one or more of silicon oxynitride, silicon oxide, and silicon nitride. When the first adjustment film layer 41a, the first adjustment film layer 41b, and the first inorganic layer 31 contain the same components, the same manufacturing process can be used for manufacturing, such as chemical vapor deposition.

[0106] A first adjustment film layer 41a and a first adjustment film layer 41b are provided between the first inorganic layer 31 and the first organic layer 32. The refractive index of the first adjustment film layer 41b is less than that of the first adjustment film layer 41a. And the refractive indices of the first adjustment film layer 41a and the first adjustment film layer 41b are between the refractive index of the first inorganic layer 31 and the refractive index of the first organic layer 32. The contact interface between the first inorganic layer 31 and the first adjustment film layer 41a and the contact interface between the first adjustment film layer 41b and the first organic layer 32 will both reflect the light emitted by the light-emitting layer 2. The reflected light from the contact interface between the first adjustment film layer 41b and the first organic layer 32 will interfere with the reflected light from the contact interface between the first inorganic layer 31 and the first adjustment film layer 41a, weakening the light reflection effect in the first inorganic layer 31.

[0107] Please refer to Figure 12 , Figure 12 is a schematic diagram of the light waveform obtained according to the Figure 11 structure; assume that the light reflected by the contact interface between the first adjustment film layer 41a and the first inorganic layer 31 from the light-emitting layer 2 is the eleventh light ray, and the eleventh light ray has an eleventh waveform λ11; the light reflected by the contact interface between the first adjustment film layer 41b and the first organic layer 32 from the light-emitting layer 2 forms a twelfth light ray, and the twelfth light ray has a twelfth waveform λ12.

[0108] In these alternative embodiments, when the thickness d of the first adjustment film layer 41a 41a , and the thickness d of the first adjustment film layer 41b 41b satisfy the above relationship, the eleventh waveform λ11 and the twelfth waveform λ12 are in the cancellation position, the peak of the eleventh waveform λ11 overlaps with the trough of the twelfth waveform λ12, so that the twelfth light ray can cancel the eleventh light ray, thereby weakening or even eliminating the reflection effect of the contact interface between the first inorganic layer 31 and the first adjustment film layer 41a, eliminating the viewing angle color shift or color rendering unevenness at a small viewing angle of red light, and further improving the display effect of the display panel 10.

[0109] A display device includes the display panel 10 included in the above embodiments. By adjusting the design of the film layer, this display device accelerates the small-angle brightness attenuation of red light and improves the phenomenon that the white-field trajectory is prone to small-angle red deviation.

[0110] It should be noted that in the embodiments of the present disclosure, the display device may further include more components and structures, and the embodiments of the present disclosure do not limit this.

[0111] The following points need to be explained:

[0112] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0113] (2) Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0114] As mentioned above, the above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A light-emitting layer, located on the substrate, the light-emitting layer comprising red sub-pixels, green sub-pixels and blue sub-pixels arranged in the same layer; A multi-layered insulating film layer is located on the side of the light-emitting layer away from the substrate, wherein the multi-layer insulating film layer includes a first adjustment film layer, and the orthographic projection of the first adjustment film layer on the light-emitting layer covers the red sub-pixel; The light emitted by the red sub-pixel, the green sub-pixel and the blue sub-pixel is reflected on the surface of the insulating film layer, and the light emitted by the red sub-pixel has the highest reflectivity on the surface of the first adjustment film layer; Among them, at least one layer of the insulating film layer is provided with a first groove, the orthographic projection of the first groove on the light-emitting layer covers the red sub-pixel, and the first adjustment film layer fills the first groove; the refractive index of the first adjustment film layer satisfies: the square root of the product of the refractive indices of the two insulating film layers adjacent to it in the stacking direction.

2. The display panel according to claim 1, characterized in that: In the stacking direction, the thickness of the insulating film layer provided with the first groove is greater than the depth of the first groove.

3. The display panel according to claim 2, characterized in that: The display panel includes an encapsulation layer, and the encapsulation layer includes a plurality of stacked insulating film layers.

4. The display panel according to claim 3, characterized in that: The insulating film layer in the encapsulation layer includes a first inorganic layer, a first organic layer, and a second inorganic layer; and the first inorganic layer is closer to the light-emitting layer than the first organic layer.

5. The display panel according to claim 4, characterized in that: The first adjustment film layer is disposed in the first inorganic layer.

6. The display panel according to claim 5, characterized in that: The first inorganic layer is provided with the first groove on a side away from the light-emitting layer; or the first adjustment film layer is provided in the first organic layer.

7. The display panel according to claim 6, characterized in that: The first groove is disposed on a side of the first organic layer facing the first inorganic layer.

8. The display panel according to claim 4, characterized in that: The first inorganic layer is provided with the first adjustment film layer, and the first organic layer is provided with the first adjustment film layer; The first adjustment film layer located in the first inorganic layer and the first adjustment film layer located in the first organic layer are spaced apart in a stacking direction.

9. The display panel according to claim 8, characterized in that: The first inorganic layer is provided with the first groove on a side close to the first organic layer; and the first organic layer is provided with the first groove on a side away from the first inorganic layer.

10. The display panel according to claim 4, characterized in that: The first inorganic layer includes a plurality of first inorganic sub-layers stacked in layers, and the first adjustment film layer is disposed in the first inorganic sub-layer adjacent to the first organic layer.

11. The display panel according to claim 3, characterized in that: The display panel further includes a touch layer, the touch layer is arranged on a side of the encapsulation layer away from the light-emitting layer, the touch layer includes the insulating film layer, the insulating film layer in the touch layer includes a third inorganic layer adjacent to the encapsulation layer; wherein the first adjustment film layer is arranged in the third inorganic layer; And / or, the first adjustment film layer is disposed in the encapsulation layer.

12. The display panel according to claim 1, wherein The first adjustment film layer comprises at least two first adjustment sub-film layers stacked in layers; In a direction from the substrate to the light-emitting layer, the refractive index of the first adjusting sub-film layer decreases layer by layer, or the refractive index of the first adjusting sub-film layer increases layer by layer.

13. The display panel according to claim 3, characterized in that: The multilayer insulating film layer also includes a second adjustment film layer and a third adjustment film layer, wherein the orthographic projection of the second adjustment film layer on the light-emitting layer covers the green sub-pixel, and the orthographic projection of the third adjustment film layer on the light-emitting layer covers the blue sub-pixel, wherein the refractive index of the first adjustment film layer is smaller than the refractive index of the second adjustment film layer, and the refractive index of the second adjustment film layer is smaller than the refractive index of the third adjustment film layer.

14. A display device, characterized in that, include: The display panel according to any one of claims 1 to 13.

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